miniDSP @ Frickelfest 2013

Our long time community member Daniel just brought his miniDSP setup to FrickelFest 2013 in Germany for a demo. A great post here summarizing his neat setup! Thanks again for sharing. :-)

Dear all, I just came back from the Frickelfest 2013. It was a really nice event with lots of impressive DIY gear, intensive discussions with friendly people and (to be honest) quite some beer and wine This year me and my friends showed our DSP based setup using the miniSHARC to crossover and EQ our Frickelfest Speakers (old Naim SBL woofer in TQWT + Monacor DT300 with waveguide). Sources where vinyl from DIY turntable and Flac using labtop + miniSTREAMER and amplifiers where a SymASym for the woofers and a Hybrid Valve+MOSFET for the tweeters.

Here is a picture of my actual miniSHARC setup with my own ES9023 based DACs (6ch out):

As a preparation we first had to measure the speakers:

The SPL vs. frequency of the raw speakers (mic was calibrated for frequency response but not for SPL):

I used the IIR Filters for crossover and FIR Filters generated by RePhase to linearize amplitude and phase (great tool!). Here is the result after 3 hours:

Thanks to the corrected phase the summing of woofer and tweeter is quite perfect:

Also the step response looks quite good (overall inverted but that shouldn't be a problem ):

Thanks to the waveguides the horizontal directivity of the speaker looks very good:

Here is the system playing at the Frickelfest (forgot to take a better picture since I was always listening to the music ):

Unfortunately I killed the miniSHARC after one day by opening and connecting the wrong plugin (2x8 plugin, DevTeam already helped me to bring it back to live! Thanks a lot!) and we had to switch over to miniDSP 2x8 which wasn't bad at all either